Arg- apparently, the D700 doesn’t use the regular HDMI (Type-A) connector, it uses a HDMI-Mini (Type-C) connector.
Wow, I didn’t even know there were different types of connectors. Thankfully, the D3 use the more normal Type-A.
If you’d like to get a cable, here’s where I bought mine for <$10 and they worked quite well. You do not need to spend a lot of money on an HDMI cable- it’s digital so it (more or less) either gets there or it doesn’t- it’s not like analog audiophile equipment.
And if you haven’t tried the HDMI out of your camera, let me tell you that it’s fantastic and wonderful to be able to put up your family snapshots on a huge HD tv instead of emailing them around a week later.