You guys need to read the datasheet a little more closely and take a step back.
The limiting factor on the resistor is power dissipation. Nothing to do with voltage rating.
https://www.mouser.com/datasheet/2/3...20-2758246.pdf
If you had 750 volts across a 2.7K resistor, it would be pumping out over 200W!
Old TV Nut had it right, you hit the 3W mark at 90 volts so there better be much less than that across the resistor.