flush vs big river raise in FTP 1k

[Bakes]

Opponent is a good aggressive player. If you fold, whats the highest flush you call with?

Full Tilt Poker, NL Hold'em Tournament, 15/30 Blinds, 9 Players
LeggoPoker.com - Hand History Converter

UTG+2: 3,985
MP1: 2,850
MP2: 3,015
CO: 2,925
Hero: 2,485
SB: 2,965
BB: 2,955
UTG: 2,865
UTG+1: 3,056

Pre-Flop: (45) 6[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/club.gif[/img] dealt to Hero (BTN)
4 folds, <font color="red">MP2 raises to 85</font>, CO folds, Hero calls 85, 2 folds

Flop: (215) 9[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/club.gif[/img] 3[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">MP2 bets 145</font>, Hero calls 145

Turn: (505) Q[img]/images/graemlins/diamond.gif[/img] (2 Players)
MP2 checks, Hero checks

River: (505) 4[img]/images/graemlins/club.gif[/img] (2 Players)
MP2 checks, <font color="red">Hero bets 370</font>, <font color="red">MP2 raises to 2,785 and is All-In</font>