$22 - Jacks overpair, paired board, facing min raise

[pergesu]

Party Poker No-Limit Hold'em Tourney, Big Blind is t30 (8 handed) FTR converter on zerodivide.cx

UTG+1 (t760)
MP1 (t775)
MP2 (t830)
CO (t1560)
Button (t700)
SB (t1845)
Hero (t775)
UTG (t755)

Preflop: Hero is BB with J[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/heart.gif[/img].
<font color="#666666">4 folds</font>, <font color="#CC3333">CO raises to t75</font>, <font color="#666666">1 fold</font>, SB calls t60, Hero calls t45.

Flop: (t225) 4[img]/images/graemlins/club.gif[/img], 6[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets t175</font>, <font color="#CC3333">CO raises to t350</font>, SB folds, Hero ?

CO was raising a lot preflop, about 1/4 of the hands. He was playing very passively postflop though, so I wanted to lead out because I didn't think he'd bet if he missed (which is pretty likely on that board). When he min raised I thought it might mean an overpair.