6 max 1/2 sort of theoretical question

[LA_Price]

Full Tilt Poker
Pot Limit Omaha Ring game
Blinds: $1/$2
5 players
Converter

the CO in this hand is and aggressive player. His total aggression factor was 4.5 for the session and he's willing to make plays.

Pre-flop: (5 players) Hero is SB with ????
UTG folds, <font color="#cc0000">CO raises to $6</font>, Button folds, Hero calls $6 <font color="aaaaaa">(pot was $9)</font>, BB folds.

Flop: 6[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/club.gif[/img] ($14, 2 players)
CO checks, Hero checks.

Turn: 9[img]/images/graemlins/heart.gif[/img] ($14, 2 players)
<font color="#cc0000">CO bets $14</font>, <font color="#cc0000">Hero raises to $56</font>, CO calls.

River: 6[img]/images/graemlins/heart.gif[/img] ($126, 2 players)
<font color="#cc0000">CO bets $126</font>,

I don't think he's full here unless he has exactly 99. And I just didn't think he had that. My question is this. If you think that your opponent is bluffing in that he's definetely not full here but you think he has something that he may think he's bluffing with. What's the minimum you call with here? I'm talking about hands like AJ, QQ's, TT's, AA, KK, J9. Or maybe you think he's full and you wouldn't call with any of these.