Call 3 bets with this draw?

[luckydonut]

PokerRoom 2/4 Hold'em (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is BB with 8[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/spade.gif[/img]. CO posts a blind of $2.
<font color="#666666">1 fold</font>, UTG+1 calls, <font color="#666666">1 fold</font>, MP1 calls, <font color="#666666">1 fold</font>, <font color="#CC3333">MP3 raises</font>, CO (poster) calls, Button calls, <font color="#666666">1 fold</font>, Hero calls, UTG+1 calls, MP1 calls.

Flop: (11.50 SB) 6[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(6 players)</font>
Hero checks, UTG+1 checks, MP1 checks, <font color="#CC3333">MP3 bets</font>, CO calls, Button calls, Hero calls, UTG+1 calls, MP1 calls.

Turn: (8.75 BB) 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(6 players)</font>
Hero checks, UTG+1 checks, <font color="#CC3333">MP1 bets</font>, MP3 calls, <font color="#CC3333">CO raises</font>, <font color="#CC3333">Button 3-bets</font>, Hero ???

Three cards make the nut straight and 9 cards make a J high flush. The pot odds right now are 5.25-1 with several players still to act. It will end up somewhere between 4.4-1 (folded to CO, who caps) and 7.9-1 (everyone else, including CO, calls).

This appears to be callable, however:
1. There appears to be a straight already so that's (at least) one of your outs dead.
2. If the nut straight (J9) is out there, the remaining 2 outs (at best) give you half the pot.
3. A stronger flush draw is not getting out of the way in this pot.

So is a call here good value, or just wishful thinking?