Start by plugging it into an amp...
OK seriously, what you're talking about is EQ (equalization). EQ controls the mix of frequencies each note uses, boosting some or cutting others (a note is not just one frequency of sound, but a "fundamental" plus a bunch of weaker "harmonics" that give it its unique tone). You have some active EQ knobs for a preamp on your MusicMan, and there will also be a set on your amp, and maybe on pedals if you're using any. So you can "stack" your EQ if you want.
To start just set one of them "flat" (knobs all centered) and tinker with the other. Most EQ systems have three bands - low, middle, and high. The lows are the "bass" part of your note and where most of your volume really is. The mids are the frequencies the human ear is most sensitive too and they give clarity and definition. The highs give your notes a certain "sizzle" on top and can also help with definition, but they also pick up stuff like finger noise squeaking on the strings and fret clank.
To get a good sense of what each EQ knob does, turn that one up to 10 and turn the others down to 0. Play some notes with your lows, for instance, at full, and none of the others; then all mids, then all highs. Once you get a sense of that, see what happens when you blend them in different combinations.
All that is a long way of saying that what you want is to crank your lows, if you want thick, boomy bass tone. But what you may also notice is that too MUCH bass and you get boomy mud without much clarity. Mids will give you that clarity, but too much mids and the tone can get "honky." Highs can also give a nice bite to the tone, but again, too much highs and it might get too squeaky and clanky.
The other thing is... back to the amp. I was only partly kidding when I started with that. Amps have their own characters and cheaper ones are limited in what frequencies they produce well as well as their volume. If you're playing through a cheap little bedroom amp with an 8" speaker you're not going to sound like you would through a huge Ampeg fridge stack, no matter what you do with the knobs.