Craig owns a piece of land that hed like to use in a new business. He will transfer the land into a newly formed corporation using Section 85. The land has an ACB of $4,000 and a FMV of $7,000. If he takes back shares of the corporation and a note payable for $2,000 as consideration, what is the ACB of the shares he takes back? Assume he elects to defer as much tax as he can.