You can download Picture Control files and load them into Nikon's Picture Control Utility (or tweak them yourself inside), then save them into a SD card to load into your D750.
If you still have the Picture Control files in your D700 you should be able to import them into Picture Control Utility, then export them out for D750, this step is necessary as D750 should be using a newer version of Picture Control so the software needs to convert the older one to a newer version
I'm unable to recommend websites with good settings because I don't really use them, maybe others with more experience can help