mine is 2.7k, but i think anything is a good answer. what i mean is, did you tell all that you wanted to tell in the chapter? did you get it all out? is now a good stopping point? reread it, does it make sense?
i think those are better questions to ask about chapters than raw word length. The Sisters of Dorley has an average word count of 20k, and it never feels too long. Digital Galaxies has an average word count of 2k and it never feels like i got shortchanged on words.
write what you can, stop where you feel is good to stop. it’s your paper, you can’t mess it up unless you say you did.