I'm a bloke, I've always worn my hair like 2cm long, but down, no hair gel or whatever, I feel okay with it cos its my natural hair and I just brush my fringeyness (bangs) to the side.
However, I have had my hair gelled up, with a look where my fringe (bangs) creates a short wall and combed back, I dont really like it, but I've been told that people like it, but I just get so shy when I've done my hair like that, I get very self conscious.
Just wear your hair to how you feel its natural to you! - There should be no pressure from anyone else.
If you dont wanna wear your hair like so and so then fair enough, like I say, wear your hear just exactly how YOU want.
Volleyball or no volleyball, your hair doesnt determine the skill you have, having a certian amount of hairstyle isnt gonna change your volleyball skill now is it.