this is one of those pretty standard "i've read the bible!" kind of claims, similar to saying that the fruit adam and eve ate was an apple. it's part of our traditional retelling.
anyways. two more problems.
1. the majority of pyramids were build in the old kingdom, and some in the middle kingdom (2800-1800 bc or so). the hebrews would have been in egypt in the new kingdom or maybe as early as the hyksos period. the dates most people work with are about 1650 bc to 1250 bc (give or take). in other words, they weren't there at the right time.
2. we know who built the pyramids. they tended to be buried next to them under their own miniature pyramid grave markers. worker graveyards have been excavated. it was an honored position, part of a higher calling to serve your god on earth. it was not something they would let slaves do.
אָרַח