What approximate value should come in place of the question mark (?)…

What approximate value should come in place of the question mark (?) in the following equation ? 2⁄7 of 1596 + 3015 = ? – 2150

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #4373