Joe Rahme Bluffing and Bluffing Big

There are two early position limpers before Joe Rahme enters the pot with a huge raise. The bill is 2,600 with blinds at 75/150 and when the action folds to Jay Sookoo in the small blind he raises to 5,000. The two limpers fold and Rahme smiles at Sookoo before making the call. The pair share a flop of [Jc] [7c] [5d] and Rahme calls a 2,500 Sookoo bet. On the turn we see the [6h] and the gold raps the felt. Rahme bets 4,500 and Sookoo folds his hand.

What hand did Rahme have that warranted a 2,600 pre flop raise? Why he had [Kh] [8s] of course.

"Well played," says Sookoo, "I had ace-king."