Calling a possibly loose over-raise all-in with nines

[Cornboy]

Kind of new to MTT's. Not sure how reasonable this is, or if it's an easy fold. Villain in this hand seems a bit loose in the few hands I've been at this table for. He's also had to lay down a couple recent hands to my raises. This is one of the stars 180 player SNG's. There's approximately 45 people left at this point, and I believe I was 5th in chips. I don't really care about just making the money.

PokerStars No-Limit Hold'em Tourney, Big Blind is t200 (9 handed) converter

Button (t4340)
SB (t4715)
BB :#A500AF(Villain)/ (t8245)
UTG (t9227)
UTG+1 (t2975)
Hero (t11773)
MP2 (t4045)
MP3 (t4525)
CO (t5575)

Preflop: Hero is MP1 with 9[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/club.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to t600</font>, <font color="#666666">5 folds</font>, <font color="#CC3333">BB :#A500AF(Villain)/ raises to t8220</font>, Hero....

My thinking was he didn't seem like the type to overpush like that with Aces or Kings. I figured at worst he had 2 overs and there was at least a decent chance he has 1 overcard, or even a smaller pair. Js and Tens are a possibility, too, I think.

Like I said, I'm not too big into MTT's, mostly a limit ring or Sit and Go player. For you MTT vets, is this an easy call? An easy fold with a big chip stack? I really have no idea what is optimal in this situation for MTT's.