Just because he's making a big bet on a ragged flop doesn't mean he called your pre flop raise with a crappy hand. It means either he thinks his hand is still good (like a pocket pair) or he thinks that that flop completely missed you, which it did.
If you think he is bullshitting you then maybe you should reraise him with your AK even though you didn't hit. Just remember he doesn't know what you have. You raised before the flop, and for all he knows you have a pair of Kings. He may think you just have over cards, and the flop missed you, but if you can bet first, or can reraise he may believe you have something good.