flopped straight, go broke on turn despite 3-flush?

[Stepping Stone]

Poker Stars, $10 + $1 NL Hold'em Tournament, 25/50 Blinds, 7 Players
LeggoPoker Hand History Converter

UTG+1: 5,550
Hero (MP): 3,840
CO: 5,885
BTN: 2,470
SB: 3,020
BB: 5,330
UTG: 610

Pre-Flop: (75) 6[img]/images/graemlins/club.gif[/img] 8[img]/images/graemlins/club.gif[/img] dealt to Hero (MP)
3 folds, <font color="red">Hero raises to 175</font>, CO calls 175, BTN calls 175, 2 folds

Flop: (600) 7[img]/images/graemlins/spade.gif[/img] 9[img]/images/graemlins/diamond.gif[/img] 5[img]/images/graemlins/diamond.gif[/img] (3 Players - 1 is All-In)
<font color="red">Hero bets 400</font>, CO calls 400, BTN folds

Turn: (1,400) K[img]/images/graemlins/diamond.gif[/img] (2 Players - 1 is All-In)
<font color="red">Hero bets 1,000</font>, <font color="red">CO raises to 5,310 and is All-In</font>