Going all-in early in a big tourney

In a WCOOP event ($1000 buy-in). 2500 starting chips. Blinds are 10/20. Second hand of the tourney.

Hero is SB. Dealt 6[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/spade.gif[/img]. CO raises to 80. Button, Hero call along with BB.

Flop is A[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/club.gif[/img]. Checked to CO. CO bets 400. Button folds. Hero raises to 1000. BB folds. CO goes all-in. Hero's play?

In a single-table S&G, I would call. In a ring-game, I would call.

But in a 1700+ person tourney, how does the risk of being eliminated from the tourney affect the betting. What I mean is that, in a single table S&G, doubling up early is very valuable because you have the large stack early. In a 1700 person tourney, you can get shifted quickly to a table where you're not the big stack any more. And in the big picture, is having 5000 chips that early in a big tourney really that valuable compared to being eliminated?

So do you adjust your play in big tourneys or do you just play the odds?

And do the odds support an all-in call here?