24 Full Frame APS-C CMOS Sensor.
3.2 inch monitor.
Great battery duration.
6.5fps continuous shooting mode.
Full HD video recording.
Superb ISO Performance 100 - 12,800.
1/4000 shutter speed could be faster.
Slow AF in live view mode.
Some white balance issues.
Not UHS-II compliant.
The D750 is great, provides high quality images. Good continuos shoot mode for high speed situations.
In general the successor of the D700 has made great improvements, is a great choice if you don’t want to spend on a D810.