NL Tournament - Raise after flop with QQQ

[PlayerOnTilt]

Hi all,
this is my first post on your wonderful website, and I'm sure you guys are gonna give me wise advice.

This is a hand from a MTT tournament on Pokerstars. We're in the middle/end of the tournament. The question is : how much should I raise here, and why ?

Poker Stars, $1 + $0.20 NL Hold'em Tournament, 75/150 Blinds, 8 Players
LegoPoker Hand History Converter

SB: 5,405
BB: 1,255
UTG: 8,970
UTG+1: 5,677
MP1: 3,185
MP2: 3,790
CO: 3,155
Hero (BTN): 5,075

Pre-Flop: (150) Q[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/spade.gif[/img] dealt to Hero (BTN)
4 folds, MP2 calls 150, CO calls 150, <font color="red">Hero raises to 800</font>, SB calls 650, MP2 calls 650, CO folds

Flop: (2,550) T[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/club.gif[/img] (3 Players)

Btw, do you think my preflop raise was good or not ?
Thanks for all your answers [img]/images/graemlins/smile.gif[/img]