According to the managerial entrenchment theory, managers choose capital structure so as to preserve their control of the firm. On the one hand, debt is costly for managers because they risk losing control in the event of default. On the other hand, if they do not take advantage of the tax shield provided by debt, they risk losing control through a hostile takeover. Suppose a firm expects to generate free cash flows of $90 million per year, and the discount rate for these cash flows is 10%. The firm pays a tax rate of 25%. A raider is poised to take over the firm and finance it with $750 million in permanent debt. The raider will generate the same free cash flows, and the takeover attempt will be successful if the raider can offer a premium of 20% over the current value of the firm. According to the managerial entrenchment hypothesis, what level of permanent debt will the firm choose? The permanent debt required to prevent a takeover is $ million. (Round to the nearest integer.)