4

Two numbers go at the $?$s, what are they and why?
$733,\space \space 716,\space \space 645,\space \space 565,\space \space 324,\space \space 276,\space \space 77,\space \space 75,\space \space 64,\space \space 56,\space \space ?,\space \space ?$
Hints