Bottom set facing tons of action

[snowbank]

Full Tilt Poker, $2/$4 NL Hold'em Cash Game, 5 Players
LeggoPoker Hand History Converter

UTG: $330.10
Hero (CO): $590
BTN: $156
SB: $402
BB: $396.50

Pre-Flop: 6[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/heart.gif[/img] dealt to Hero (CO)
<font color="red">UTG raises to $14</font>, Hero calls $14, 2 folds, BB calls $10

Flop: ($44) J[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] T[img]/images/graemlins/diamond.gif[/img] (3 Players)
BB checks, <font color="red">UTG bets $26</font>, <font color="red">Hero raises to $75</font>, <font color="red">BB raises to $216</font>, <font color="red">UTG raises to $316.10 and is All-In</font>,

Both players seem relatively tight, have done nothing so far to make me think they are very wild. how deep do you have to be to fold here?